From a6ac746b4f351b8c6bc1351e26801311485b21fd Mon Sep 17 00:00:00 2001
From: NathanSweet <nathan.sweet@gmail.com>
Date: Thu, 1 Dec 2016 17:29:04 +0100
Subject: [PATCH] [libgdx] Avoid setting a NaN mixAlpha.

http://esotericsoftware.com/forum/UNITY-5-4-1f1-BUG-ArithmeticException-NAN-7135?p=34824#p34824
---
 .../src/com/esotericsoftware/spine/AnimationState.java          | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/spine-libgdx/spine-libgdx/src/com/esotericsoftware/spine/AnimationState.java b/spine-libgdx/spine-libgdx/src/com/esotericsoftware/spine/AnimationState.java
index 8673595ae..bb36da96e 100644
--- a/spine-libgdx/spine-libgdx/src/com/esotericsoftware/spine/AnimationState.java
+++ b/spine-libgdx/spine-libgdx/src/com/esotericsoftware/spine/AnimationState.java
@@ -385,7 +385,7 @@ public class AnimationState {
 			from.timelinesRotation.clear(); // Reset rotation for mixing out, in case entry was mixed in.
 
 			// If not completely mixed in, set mixAlpha so mixing out happens from current mix to zero.
-			if (from.mixingFrom != null) current.mixAlpha *= Math.min(from.mixTime / from.mixDuration, 1);
+			if (from.mixingFrom != null && from.mixDuration > 0) current.mixAlpha *= Math.min(from.mixTime / from.mixDuration, 1);
 		}
 
 		queue.start(current);